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Technical Data Sheet
PartsTable / COMPONENT / IR-1-20
IR-1-20 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The COUPLER,DIRECTIONAL is a the manufacturer industrial component. Key specifications include unit_type: COAXIAL LINE, design_type: UNIDIRECTIONAL, usage_design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING, overall_width: 0.770 INCHES NOMINAL IN, overall_height: 0.780 INCHES NOMINAL IN, overall_length: 2.690 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-178-1143, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
IR-1-20
NSN: 5985-00-178-1143
FSC: 5985
CAGE: 12457 — MERRIMAC INDUSTRIES, INC (USA)
SPECIFICATIONS
unit_typeCOAXIAL LINE
design_typeUNIDIRECTIONAL
usage_designMAIN LINE AND SECONDARY LINE TERMINAL FITTING
overall_width0.770 INCHES NOMINAL IN
overall_height0.780 INCHES NOMINAL IN
overall_length2.690 INCHES NOMINAL IN
power_loss_in_decibels2.0
radio_frequency_rating0.15 MEGAHERTZ MINIMUM AND 40.0 MEGAHERTZ MAXIMUM
NSN5985-00-178-1143
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUPLER,DIRECTIONAL TITLE COMPONENT PN IR-1-20 MFR COUPLER,DIRECTIONAL
KEY FEATURES
•
RADIO FREQUENCY RATING: 0.15 MEGAHERTZ MINIMUM AND 40.0 MEGAHERTZ MAXIMUM
•
UNIT TYPE: COAXIAL LINE
•
DESIGN TYPE: UNIDIRECTIONAL
•
USAGE DESIGN: MAIN LINE AND SECONDARY LINE TERMINAL FITTING
•
POWER LOSS IN DECIBELS: 2.0
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.780 INCHES NOMINAL IN
RADIO FREQUENCY RATING0.15 MEGAHERTZ MINIMUM AND 40.0 MEGAHERTZ MAXIMUM
UNIT TYPECOAXIAL LINE
DESIGN TYPEUNIDIRECTIONAL
OVERALL LENGTH2.690 INCHES NOMINAL IN
OVERALL WIDTH0.770 INCHES NOMINAL IN
USAGE DESIGNMAIN LINE AND SECONDARY LINE TERMINAL FITTING
POWER LOSS IN DECIBELS2.0
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
3670Interchangeable
interchangeable cross-reference
interchangeable
GIT-3670Interchangeable
interchangeable cross-reference
interchangeable
GGG-W-646 TY2CL1STBFMAPT153Interchangeable
interchangeable cross-reference
interchangeable
16018TInterchangeable
interchangeable cross-reference
interchangeable
03-670-000Interchangeable
interchangeable cross-reference
interchangeable
3-660Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is IR-1-20?
IR-1-20 is a COUPLER,DIRECTIONAL.
What parts can replace IR-1-20?
There are 18 known substitutes for IR-1-20: 3670, GIT-3670, GGG-W-646 TY2CL1STBFMAPT153 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for IR-1-20?
IR-1-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-00-178-1143. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026